I have a Samsung RF263AEWP that's driving me crazy. About every hour or two the thing makes an incredibly loud "pop" sound. There is no water line hooked up and the ice maker is off, but it's not the typical "clunk" sound you hear from an ice maker anyway. The sound is a very sharp crack, like a whip. It's loud. I can hear it in the bedroom at night where it occasionally wakes me up. I can even hear it while I'm watching TV in the living room.
Samsung sent a technician who knew so little English that we couldn't even communicate something as simple as where the refrigerator was. He looked it over and when I showed him a recording he just shrugged his shoulders.